Agilent Technologies 4284A Service Manual page 96

4-8-2. TROUBLESHOOTING AIDS
Table 4-4 shows the troubleshooting waveforms, and Table 4-5 lists the DC output voltage at
each test point.
DISCONNECT THE POWER CABLE BEFORE WATCHING THE BELOW WAVEFORMS
HP 4284A Setup:
1. Disconnect the power cable.
2. Remove the Al board.
3. Set Al W1 to the test position.
4. Tie Al TP3 to A1TP10.
5. Supply +12 V DC to Al TP2 referenced to Al TP3.
Table 4-4. Power Supply Troubleshooting Data
HP 4284A Settings
See Above
See Above
171717;171
Measurement Setup
CHAN A: A l TP1
CHAN B: A l TP5
TRIG: C H A N A
( Negative)
CHAN A: A l TP4
CHAN B: A l TP8
TRIG: C H A N A
( Negative)
4-A1-3
Waveform
1 0 . 0 v d , , , 1 0 . 0 V / d i v 1 0 . 0 u s , d i v
1 0 . 0 V/d1%. 1 0 . 0 V , d i v 1 0 . 0 u s i d i v
-1.-- — - 1 - - - -
- 7 J ,.._ " .
_ I
N 7
. . - -
r 1 - , - - - • ' — ' . r "
1
4
s}aaqs 33
— 4